Предмет: Биология, автор: КатяЛукашова

Что случится, если срезать верхушечную почку побега

Ответы

Автор ответа: Anastasia3111

В верхушке побега вырабатывается ауксин - вещество, которое подавляет развитие боковых почек. До тех пор, пока верхушка цела, верхушечный побег развивается сильнее боковых, а всё растение растёт в высоту. Это явление называется апикальным (верхушечным) доминированием. Оно характерно для ветвящихся растений.

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ДОБАВИТЬ В ИЗБРАННОЕ

Variant I.

Task I. Выберите нужную форму глагола: Past Simple or Present Perfect.
1. I ___ my best friend for ten years.
A have known B knew C has known
2. Somebody ___ our car last Sunday.
A stole B has stolen C have stolen
3. I don’t want to go to the cinema. I ___ this film.
A has already seen B have already seen C already saw
4. Michael ___ to play the piano last year.
A has learnt B have learnt C learned
5. My parents ___ to Germany in 2005.
A went B has gone C have gone

Task II. Выберите нужную форму возвратного местоимения: (myself, itself, herself, himself, ourselves, yourself, themselves)
1. The girl decorated the room ______.
2. The winner looked very proud of ______.
3. The cat is washing ______.
4. The children enjoyed______ when they visited Disneyland.
5. If you don’t behave ______, I shall put you all to bed early.

Task III. Выберите нужную форму предлога: for / since
1. I haven't slept … 48 hours.
2. Sarah has been waiting for her sister … a long time.
3. They haven't visited us … Christmas.
4. She has been in hospital … Monday.
5. They have been playing football … an hour and a half.

Task IV. Выберите соответствующий вариант в косвенной речи.
1. «I think the film was a great success» — said Peter.
Peter said that … .
a) he thinks the film was a great success
b) he thought the film was a great success
c) he thought the film had been a great success
d) I thought the film had been a great success
2. «I`ll come to the meeting», — Tom said to me.
Tom said that … come to the meeting.
a) I will
b) I would
c) he will
d) he would
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He said that he … English very well.
a) can speak
b) could speak
c) will speak
d) may speak
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She said that she … for me since five o`clock.
a) have been waiting
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c) if he often plays
d) if you often played

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VI. Составьте и напишите ситуацию с данными словосочетаниями. Используйте все слова:
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Variant II.

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a) if Tonny went
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